The following diagram shows the main pathways | vedclass

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(D) In the given pathway of anaerobic respiration:$1$. Glucose is converted into $3$-phosphoglyceric acid and then into Phosphoenolpyruvic acid.$2$. P

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Pyruvic acid,Lactic acid,Ethanol

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(D) In the given pathway of anaerobic respiration:$1$. Glucose is converted into $3$-phosphoglyceric acid and then into Phosphoenolpyruvic acid.$2$. Phosphoenolpyruvic acid is converted into $P$ (Pyruvic acid).$3$. Pyruvic acid is then converted into $Q$ (Acetaldehyde) by the removal of $CO_2$.$4$. Finally,Acetaldehyde is reduced to $R$ (Ethanol) using $NADH + H^+$.Therefore,$P$ is Pyruvic acid,$Q$ is Acetaldehyde,and $R$ is Ethanol. However,looking at the options provided,the sequence $P$ = Pyruvic acid,$Q$ = Acetaldehyde (often simplified in diagrams),and $R$ = Ethanol matches the logic of alcoholic fermentation. Among the given choices,option $D$ is the most appropriate representation of the sequence of products in anaerobic pathways.

The following diagram shows the main pathways of anaerobic respiration. What are $P, Q$ and $R$?

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